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Method for preparing stainless steel fiber resin matrix composite conductive plastics

A technology of composite conductive and fiber resin, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, can solve the problems of affecting the formation of conductive networks, performance limitations, and reducing the service life of screws, and achieves the improvement of mechanical properties and electrical conductivity. Effect

Active Publication Date: 2013-11-06
SHENZHEN FRD SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of this process are simple process flow, narrow fiber content distribution and high stability in the production process. However, since the material of stainless steel fibers is 100% stainless steel, continuous stainless steel fibers will cause high wear and tear on the screw, which will be greatly reduced. The service life of the screw
In addition, due to the strong shearing effect of the twin-screw, the stainless steel fiber is easily cut into pieces, which affects the formation of the conductive network. Therefore, a high amount of addition is required to obtain better electrical conductivity. Therefore, the stainless steel fiber composite conductive The application and promotion of plastics has always been limited by their performance, and they still cannot completely replace some traditional metal materials in many applications

Method used

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  • Method for preparing stainless steel fiber resin matrix composite conductive plastics
  • Method for preparing stainless steel fiber resin matrix composite conductive plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use 8% epoxy halogenated bisphenol A and 0.4% gamma-(2,3-epoxypropoxy)propyltrimethoxysilane and deionized water to form a composite treatment solution, with this composite treatment solution Surface treatment is carried out on stainless steel fibers (the diameter is 10 μm, and the number of fibers per bundle is 4k) to improve the interfacial bonding performance between stainless steel fibers and resin materials; dry the treated stainless steel fibers at 100°C for 48 hours for later use, and ensure The moisture content of stainless steel fiber is less than 0.2%.

[0019] Mix 96.5 parts of polycarbonate resin with a melt index of 10g / 10min, 0.5 part of pentaerythritol stearate, and 3 parts of acrylonitrile / butadiene / styrene copolymer high rubber powder in a high-speed mixer for 5 to 15 minutes, Ensure that all components are mixed evenly;

[0020] Such as figure 1 As shown, the mixed raw materials are put into the feeding hopper of the co-rotating twin-screw extruder 2...

Embodiment 2

[0024] Use 40% epoxy bisphenol F epoxy and 2% gamma-(methacryloyloxy) propyltrimethoxysilane and deionized water compound treatment solution to stainless steel fiber (its diameter is 10 μ m, each bundle The number of fibers is 4k) for surface treatment to improve the interfacial bonding performance between stainless steel fibers and resin. Dry the treated stainless steel fiber at 100°C for 48 hours for later use, and ensure that the moisture content of the stainless steel fiber is lower than 0.2%.

[0025] 71.5 parts of polycarbonate resin with a melt index of 22g / 10min, 18 parts of triphenyl phosphate, 0.5 part of ethylene bisstearamide, and 10 parts of methyl methacrylate-butadiene-styrene copolymer were mixed at high speed Mix in the machine for 5 to 15 minutes to ensure that the resin and various additives are mixed evenly. Put the mixed raw materials into the feeding hopper of the co-rotating twin-screw extruder 2, and melt and knead them through twin-screw extrusion. Ex...

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Abstract

The invention discloses a method for preparing stainless steel fiber resin matrix composite conductive plastics. A resin material contains stainless steel fibers accounting for 3-40% of the overall weight, epoxy emulsion and silane coupling agent compound treating fluid are used as interface compatilizers, and a resin material layer is uniformly coated on a stainless steel fiber surface, so that the stainless steel fiber resin matrix composite conductive plastics are prepared. The method includes the steps: performing surface treatment for the stainless steel fibers by the aid of the epoxy emulsion and the silane coupling agent compound treating fluid and drying the stainless steel fibers in a drying oven; pulling out the stainless steel fibers by the aid of a coating die to coat the resin material on the stainless steel fiber surface; and dicing the stainless steel fibers into particles by the aid of a dicing cutter to obtain particles of the stainless steel fiber resin matrix composite conductive plastics. The conductive plastics prepared by the method have excellent mechanical performance and electrical conductivity, and the lowest volume resistivity can be 10-1omega.cm. Coaxial flange method test results indicate that the electromagnetic shielding property of the conductive plastics with the thickness of 2mm ranges from 40dB to 65dB within the frequency range from 30MHz to 1000MHz.

Description

technical field [0001] The invention relates to a preparation method of stainless steel fiber resin-based composite conductive plastic. Background technique [0002] Plastic itself is a good insulator, and the volume resistivity of most plastics exceeds 10 15 Ω.cm, even up to 10 20 Ω.cm. The insulation of plastics prevents the electrostatic charge accumulated on the surface of plastic products from being released, and then forms an electrostatic voltage, which is easy to absorb dirt such as dust. When the electrostatic voltage reaches a certain level, electrostatic discharge and electric shock will occur. On the other hand, with the development of the modern electronics industry, electromagnetic wave interference and radio frequency interference have become new "environmental pollution" problems, and the micro-current between precision electronic components is easily affected by such a complex electromagnetic environment, resulting in misoperation , image disturbance, etc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08L63/04C08L63/00C08K7/06C08K3/08B29B9/06H01B1/22
Inventor 史航万怡灶
Owner SHENZHEN FRD SCI & TECH